William Mark Haynes, M.D.
Family Medicine Physician · Homer, LA
William Mark Haynes, M.D. is a family medicine physician with a practice address in Homer, Louisiana, and NPI 1184735151, issued on Aug 31, 2006. Check the license (Louisiana 017831, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Mark Haynes
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 017831 LA
Self-reported in NPPES; status is on the state search - Practice location
- 912 W Main St, Homer, LA 71040
- Phone
- (318) 927-3571
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (318) 927-2677
- Medicaid ID
- 1347086 LA
- Medicare enrollment
- Enrolled (PECOS I20100301000012); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In Shreveport, 1984
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,728 in Louisiana → Look up another NPI →
Also registered at 912 W Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kristen Alexander, FNPFamily Nurse Practitioner1942134606
- Joan Cardin, NPFamily Nurse Practitioner1003854746
- Donald Haynes, M.D.Internal Medicine Physician1306957386
- Katherine Rains, ACNPAcute Care Clinical Nurse Specialist1487954608
Verify William Mark Haynes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 017831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average family medicine physician in 2024
10,812 Medicare Part D claims for 381 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 1,283 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen1,011 claims
- Atorvastatin Calcium565 claims
- Losartan Potassium343 claims
- Alprazolam320 claims
- Gabapentin312 claims
- Amlodipine Besylate297 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $132.23
7 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Homer Memorial HospitalHomer, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Mark Haynes among 1,728 family medicine physician records in Louisiana
William Mark Haynes, M.D. is one of 1,728 family medicine physician records with a practice address in Louisiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 56% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1984 · median 2006 among the 1,201 with a school on file
- Record last updated2015 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 family medicine physician records list a practice address in Homer
They are 4 of the 54 NPPES records with a practice address in Homer, and 1,728 family medicine physician records in Louisiana.
All 1,728 in Louisiana → Every provider in Homer → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Larry Ezell, MDHomer, LA 710401679523807
- Clifton Salmon, M.D.Homer, LA 710401346205507
- John Smith, MDHomer, LA 710401669402582
- Clint Butler, MDHaynesville, LA 710381306876826
- Lori Eubanks, FNPMansfield, LA 710521982717716
- Jeffrey Evans, MDMansfield, LA 710521528047008
- Benjamin Leggio, MDMansfield, LA 710521851370332
- Joseph Bolger, M.D.Minden, LA 710551013914357
Common questions
What is William Mark Haynes, M.D.'s NPI number?
William Mark Haynes, M.D.'s National Provider Identifier (NPI) is 1184735151, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Mark Haynes, M.D. located?
The NPPES record lists a practice address at 912 W Main St, Homer, LA, 71040. Phone: (318) 927-3571. Providers update this record themselves, so call before visiting.
How can I verify William Mark Haynes, M.D.'s license?
NPPES lists Louisiana license number 017831, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Mark Haynes, M.D. prescribe under Medicare Part D?
In 2024, William Mark Haynes, M.D. had 10,812 Medicare Part D claims for 381 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William Mark Haynes, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.